Britney Spears Weave Gotta Go ... With a New Look [TMZ TV]

3/4/2015 10:00 AM PST

Britney Spears left her Las Vegas stage feeling a little lighter the other night -- because a huge chunk of her hair fell out! Well, it wasn't exactly HER hair ... more like a weave ... or maybe an extension.

We're not sure about that, but we are sure ... one of us is really upset about this!